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Home > Animals & Livestock > Livestock Siting & Planning > Feedlot Decision Making Tool > Animal Unit Calculation Worksheet

Animal Unit Calculation Worksheet


Animal units (AU) are used in the permitting, registration, and the environmental review process because they allow equal standards for all animals based on size and manure production. An AU is calculated by multiplying the number of animals by an animal unit factor for the specific type of animal. When more than one type of animal is planned for a feedlot, the number of AUs is the sum of the AUs for each type of animal.

Use the worksheet to calculate the number of animal units your operation holds.

Instructions:

  1. Determine the total number of animals by type (column 1) and record that number in column 2.
  2. Multiply the number in column 2 by the "animal unit factor" in column 3 to give the number of animal units by animal type. Record this number in column 4.
  3. Add all the numbers from column 4 to get the total number of animal units for your facility
  4. Federal "animal unit factors" apply to CAFO's. More information is available online at the Environmental Protection Agency.
Animal Unit Calculation Table

1.
Animal Type

2.
Number of Animals

3.
MN Animal Unit Factor

4.
Number of Animal Units

A. Dairy Cattle

1. Mature cow over 1,000 pounds

 

1.4

 

2. Mature cow under 1,000 pounds

 

1.0

 

3. Heifer

 

0.7

 

4. Calf

 

0.2

 

B. Beef Cattle

1. Slaughter steer or stock cow

 

1.0

 

2. Feeder cattle or heifer

 

0.7

 

3. Cow and calf pair

 

1.2

 

4. Calf

 

0.2

 

C. Swine

1. Over 300 pounds

 

0.4

 

2. Between 55 and 300 pounds

 

0.3

 

3. Under 55 pounds

 

0.05

 

D. Horse

 

1.0

 

E. Sheep and lambs

 

0.1

 

F. Chickens

1. Laying hen or broiler (liquid manure system)

 

0.033

 

2. Chicken over 5 pounds (dry manure system)

 

0.005

 

3. Chicken under 5 pounds (dry manure system)

 

0.003

 

G. Turkeys

1. Over 5 pounds

 

0.018

 

2. Under 5 pounds

 

0.005

 

H. Ducks

 

0.01

 

I. Animal not listed in item A to H

 

Average weight of the animal
in pounds divided by 1,000
pounds

 

Total Number of Animal Units (Add up all the numbers in column 4)

Animal
Units =